Sage Apastamba wrote a book named Apastamba Sutramulu incorporating the traditions of persons wearing the sacred thread (Dvija). All the traditions and ceremonies of Rajus are based on these sutras. They have marriage alliances with the persons belonging to the other Gotras. As Vasistha was the guru of both Koundinya and Vasistha Gotras, he is considered as the Pithru (Father) of both of them and so there were no marriage alliances between these two Gotras. However, for the last few centuries they discarded this tradition.

Most surnames in Andhra Pradesh come from the family’s town of origin so some of the surnames are found in other Andhra communities. Some of the Kshatriya names are actually the same but due to regional pronunciation differences they are spelt differently.